Nova Zhang
DisplayPort is an audio/video interconnect specification that can carry both audio and video signals over a single connection. It supports up to 8 digital audio channels at up to 24 bits and 192 kHz, as well as advanced audio formats such as Dolby Atmos. The ability to transmit audio and video through a single connection simplifies setup and enhances user convenience, especially in settings where high-quality audio is essential, such as gaming, streaming content, or working on multimedia projects. However, it is important to note that the support for audio over DisplayPort depends on the manufacturer's implementation and the capabilities of the display device. Some displays may have limited audio processing capabilities or may not fully support audio transmission through DisplayPort, so checking the device specifications is crucial to ensure optimal audio performance.
| Characteristics | Values |
|---|---|
| Sound transmission | Yes, DisplayPort supports multi-channel audio and advanced audio formats |
| Audio return channel | No, unlike HDMI, DisplayPort does not support audio return channel (ARC) |
| Audio quality | DisplayPort can support up to 32 audio channels, 1536kHz sample rates, and immersive surround sound technologies |
| Compatibility | DisplayPort can transmit audio and video through a single connection, eliminating the need for separate audio cables |
| Device compatibility | Most modern devices with DisplayPort connections are compatible with audio transmission |
| Default audio device settings | Users should ensure that their default audio device settings are configured correctly to transmit audio via DisplayPort |
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What You'll Learn
DisplayPort supports multi-channel audio
DisplayPort is a high-speed digital connection interface widely used with monitors and computers. It supports multi-channel audio and many advanced audio features. DisplayPort to HDMI adapters also include the ability to support HDMI audio.
DisplayPort is designed not only for video transmission but also to carry uncompressed digital audio. This allows a single DisplayPort connection to deliver crystal clear images to monitors while also sending multi-channel sound to speakers or headphones. Dedicated auxiliary channels in DisplayPort are used to carry I2S multi-channel sound. This enables glitch-free playback even with complex surround sound configurations.
DisplayPort cables explicitly mention 8-channel audio support, guaranteeing their ability to transmit complex surround sound between PCs, GPUs, and monitors. The DisplayPort interface standard has been updated over time with new features and bandwidth levels. As the table shows, DisplayPort 1.2 and higher versions provide enough performance to simultaneously handle high-resolution video signals and multi-channel audio.
DisplayPort supports up to 8 digital audio channels at up to 24 bits and 192 kHz. However, it does not feature an audio return channel (ARC) like HDMI, which allows sound to flow in both directions.
While DisplayPort supports multi-channel audio, it is up to the manufacturer to implement audio support. Some laptops may not output audio over a digital video interconnect, and a DisplayPort to HDMI adapter that supports audio may be required.
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Dolby Atmos delivers three-dimensional sound
Dolby Atmos is a surround sound technology developed by Dolby Laboratories. It delivers three-dimensional sound by freeing sound from the limitations of channels. Artists can treat specific sounds as individual entities, or audio objects, and place and move them precisely anywhere in a three-dimensional space. This is achieved through the use of overhead speakers and front, back, and side speakers. The Dolby Atmos cinema processor determines which speakers to use to recreate the desired movement.
The first cinema to feature Dolby Atmos was the El Capitan Theatre in Los Angeles for the premiere of Brave in June 2012. Since then, Dolby Atmos has been implemented in a variety of consumer technologies, including headphones, televisions, mobile phones, tablets, and cars. Dolby Atmos for headphones is available on Apple AirPods (third-generation and newer), AirPods Pro, AirPods Max, and most headphones under the Beats brand.
Dolby Atmos creates powerful, moving audio that immerses the listener in a way that traditional surround sound cannot. Traditional surround sound confines sounds to a small set of channels, limiting the number of angles from which sound can originate. Additionally, if one sound is emphasised in a traditional mix, another must be diminished. Dolby Atmos overcomes these limitations by enabling sound to exist as individual entities, or audio objects, that can be placed and moved anywhere in the three-dimensional space.
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DisplayPort transmits audio and video through a single connection
DisplayPort is a versatile interface that can transmit both audio and video signals through a single connection. This means that users can enjoy synchronized audiovisual playback without the need for separate audio cables. DisplayPort supports Dolby Atmos, an advanced audio format that delivers three-dimensional sound, providing an immersive audio-visual experience. It also supports advanced audio formats and specifications, with the ability to handle up to 32 audio channels, 1536kHz sample rates, and immersive surround sound technologies. This makes DisplayPort a preferred choice for professional audio applications, such as recording studios and high-end home theater setups.
The DisplayPort specification is an audio/video interconnect spec, allowing both audio and video to be carried over a single connection. However, it is up to the manufacturer to implement audio support over DisplayPort. Some devices, such as MacBook Pros, may not output audio over DisplayPort but may support audio through a Mini DisplayPort or HDMI adapter. It is important to check the device specifications and ensure that both the source and receiving devices support audio over DisplayPort.
DisplayPort was introduced in 2006 by a consortium of PC and chip manufacturers as a follow-up to the older VGA and DVI standards. The main focus was on computer displays, graphics cards, and professional IT equipment. DisplayPort connectors have 20 pins and are available in two sizes: the standard DisplayPort and the smaller Mini DisplayPort, created by Apple. The standard DisplayPort connectors usually have a latching mechanism to prevent accidental disconnection, although this is not a requirement.
DisplayPort offers several benefits, including the ability to drive multiple displays with a single cable. This feature is known as Multi-Stream Transport (MST) and is particularly useful for professionals who require multiple displays. DisplayPort also supports high-resolution video, with the latest versions offering even higher maximum bandwidth and supported resolutions. For example, DisplayPort 1.4a supports 8K video at 60Hz and 24-bit color, and even higher resolutions can be achieved with compression.
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DisplayPort to HDMI audio transmission is possible
DisplayPort is an audio/video interconnect specification that can carry both audio and video over a single connection. However, it is rare for laptops to implement audio-out over a digital video interconnect. For instance, MacBook Pros do not do it over their DisplayPort outputs. Newer MacBook models may support audio-over-DisplayPort.
DisplayPort and HDMI are often compared because they have many of the same features. The main difference is that HDMI features an audio return channel (ARC), which allows sound to flow in both directions. This means that the source device can send audio to the television set, and sound can also go in the opposite direction.
To enable audio over DisplayPort on a MacBook, go to System Preferences > Sound and select the option to output sound to the TV/Monitor.
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DisplayPort audio offers advanced audio formats
DisplayPort is a digital interface that can carry audio, video, USB, and other types of data over a single cable. It was introduced in the 2000s to replace older standards like VGA, DVI, and FPD-Link. DisplayPort supports multi-channel audio and advanced audio formats, making it a versatile interface for multimedia applications.
DisplayPort offers lossless uncompressed quality, while HDMI audio is often compressed. DisplayPort's higher bandwidth enables the transfer of more advanced multi-channel options and advanced audio formats. It can handle common standards like Dolby Digital and DTS, and DisplayPort 1.2+ also supports advanced formats like Dolby Atmos, an advanced audio format that delivers immersive, three-dimensional sound.
DisplayPort 2.0 increases available bandwidth to 77.4 Gbps, allowing for the next generation of DisplayPort to have the capacity for lossless versions of the most advanced spatial audio available. It will offer consistently reliable throughput up to 16K video resolution alongside expanding audio requirements. More bandwidth empowers DisplayPort to carry pristine quality, high channel count audio formats.
DisplayPort excels in professional environments requiring multiple audio channels and advanced configurations. It is often used in fields that require ultra-high-definition visuals alongside superior audio quality. DisplayPort's flexible interface has the potential to support object-based audio formats as it continues to develop.
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Frequently asked questions
Yes, DisplayPort carries audio signals from the GPU to the connected display device.
Check your default audio device settings to make sure they are set to the correct output device. You can do this by clicking the speaker icon on the bottom right of your screen and choosing the correct output device from the available options.
Yes, DisplayPort supports Dolby Atmos and other advanced audio formats and specifications.
HDMI features an Audio Return Channel (ARC) which allows sound to flow from the display back to the source. DisplayPort does not have this feature.
Yes, DisplayPort to HDMI can support audio but the HDMI-DP adapter must also support audio.
